The Structure of the Local Interstellar Medium. IV. Dynamics, Morphology, Physical Properties, and Implications of Cloud-Cloud Interactions*

摘要: We present an empirical dynamical model of the LISM based on 270 radial velocity measurements for 157 sight lines toward nearby stars. Physical parameter (i.e., temperature, turbulent velocity, depletions) are availablefor90components,orone-thirdof thesample,enablinginitialcharacterizationsof thephysicalpropertiesof clouds. The includes 15 warm clouds located within pc Sun, each with a different vector. derive projected morphologies all and estimate volume filling factor partially ionized material intheLISMtobebetween � 5.5%and 19%.Relative velocitiesof potentially interactingclouds areoftensupersonic, consistent heating, turbulent, metal depletion properties. Cloud-cloud collisions may be responsible filamentary found in 1 clouds, distribution along boundaries two nearestclouds(LICandG),thedetailedshapeandheatingof theMicCloud,thelocationof nearbyradioscintillation screens, location cold cloud. Contrary to previous claims, Sun appears transition zone between LIC G Cloud. Subject headingg ISM: atoms — structure line: profiles ultraviolet: ISM stars